KR100195371B1 - Method of manufacturing a cup-shaped article - Google Patents
Method of manufacturing a cup-shaped article Download PDFInfo
- Publication number
- KR100195371B1 KR100195371B1 KR1019950035021A KR19950035021A KR100195371B1 KR 100195371 B1 KR100195371 B1 KR 100195371B1 KR 1019950035021 A KR1019950035021 A KR 1019950035021A KR 19950035021 A KR19950035021 A KR 19950035021A KR 100195371 B1 KR100195371 B1 KR 100195371B1
- Authority
- KR
- South Korea
- Prior art keywords
- cylindrical
- thickness
- plate thickness
- ironing
- plate
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 methods Methods 0.000 claims abstract description 57
- 238000010409 ironing Methods 0.000 claims abstract description 45
- 239000000463 materials Substances 0.000 claims abstract description 43
- 238000007906 compression Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 abstract description 19
- 238000010586 diagrams Methods 0.000 description 6
- 238000007796 conventional methods Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 239000011248 coating agents Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N ethyl urethane Chemical compound 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- 230000004323 axial length Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nMzAwcHgnIGhlaWdodD0nMzAwcHgnIHZpZXdCb3g9JzAgMCAzMDAgMzAwJz4KPCEtLSBFTkQgT0YgSEVBREVSIC0tPgo8cmVjdCBzdHlsZT0nb3BhY2l0eToxLjA7ZmlsbDojRkZGRkZGO3N0cm9rZTpub25lJyB3aWR0aD0nMzAwJyBoZWlnaHQ9JzMwMCcgeD0nMCcgeT0nMCc+IDwvcmVjdD4KPHRleHQgZG9taW5hbnQtYmFzZWxpbmU9ImNlbnRyYWwiIHRleHQtYW5jaG9yPSJzdGFydCIgeD0nMTI1Ljk4MScgeT0nMTU2JyBzdHlsZT0nZm9udC1zaXplOjQwcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7ZmlsbDojM0I0MTQzJyA+PHRzcGFuPkZlPC90c3Bhbj48L3RleHQ+Cjwvc3ZnPgo= data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000011514 iron Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000036633 rest Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000758 substrates Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/30—Deep-drawing to finish articles formed by deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/21—Deep-drawing without fixing the border of the blank
Abstract
Description
1 is a process diagram of a bottomed cylindrical product forming method of a first embodiment according to the present invention.
2 is a partial cross-sectional view of the apparatus in the drawing process of FIG.
3 is a partial cross-sectional view of the apparatus in the coining process of FIG.
4 is a partial cross-sectional view of the apparatus in the ironing process of FIG.
5 is a relationship between load and stroke in the ironing process of the method of the present invention and the conventional method.
6 is a diagram showing diameter accuracy of the axial position of the cylindrical portion in the ironing process of the method of the present invention and the conventional method.
7 is a partial cross-sectional view of the vertical punch in the coining step of FIG.
8 is a partial cross-sectional view of the upper and lower punches different from FIG. 7 that can be used in the coining process of FIG.
9 is a partial cross-sectional view of the upper and lower punches different from FIG. 7 that can be used in the coining process of FIG.
10 is a relation between the product diameter accuracy and the coining plate thickness reduction rate when the plate thickness is increased by coating using the punch of FIG.
11 is a relationship between coating load and coining punch shape of FIGS. 7 to 9;
12 is a partial cross-sectional view of a plate pressure increasing process of the method of forming a bottomed cylindrical product of a second embodiment of the present invention.
13 is a cross-sectional view of a flat plate material of a bottomed cylindrical article of a third embodiment of the present invention.
FIG. 14 is a cross-sectional view of the drawing product obtained by drawing the flat plate material of FIG. 13; FIG.
FIG. 15 is a cross-sectional view of the iron product of the drawing product of FIG. 14; FIG.
FIG. 16 is a cross-sectional view in the case of forming a flat plate material which can be used in the third embodiment of the present invention by coining. FIG.
FIG. 17 is a cross-sectional view of a flat plate material which can be used in the third embodiment of the present invention by press ironing. FIG.
18 is a process diagram of a bottomed cylindrical product forming method by a conventional drawing process.
FIG. 19 is a sheet thickness distribution diagram of a drawing product formed by the process of FIG. 18. FIG.
20 is a process diagram of a bottomed cylindrical product forming method by conventional drawing + ironing.
21 is a relationship between the load and the punch stroke in the ironing fixing of FIG.
22 is a plate thickness distribution diagram of the ironing product of FIG. 20. FIG.
Figure 23 is a partial cross-sectional view of a plate pressure increasing process of one of the bottomed cylindrical product forming methods of the second embodiment of the present invention.
* Explanation of symbols for main parts of the drawings
15: cylindrical material with bottom 16: drawing material
17: cylindrical product with bottom 24: flat disc
[Industrial use]
The present invention relates to a method for forming a bottomed cylindrical product with high precision in a flat disc.
[Prior art]
Conventionally, the following methods (1) and (2) are generally used as a method for forming a bottomed cylindrical product from a flat plate, and a method (3) has been proposed as a method of suppressing fluctuation of plate thickness of a cylindrical part.
(1) As shown in FIG. 18, the plate-like material 51 is trimmed into the original plate 52 by a press, followed by drawing processing (forcibly relaxing the plate thickness, and forming a cup shape by a die and a punch). ) To form a bottomed cylindrical product (53).
② As shown in FIG. 20, after the drawing process of ①, additional ironing processing (a process of increasing the thickness of the cylindrical portion in the axial direction while changing the plate thickness with a die and a punch) is performed. A method of forming a cylindrical product 54.
③ In the method disclosed in Japanese Patent Laid-Open Publication No. 5-329559, the sheet-shaped panel is drawn into a bottomed material, followed by forward ironing and reverse ironing to form a bottomed cylindrical product. How to.
[Problems that the invention tries to solve]
However, the conventional molding method has the following problems.
In the drawing method of (1) above, in the draw-molding of a plate-like material, the plate-shaped material is tensile-molded in the radial direction at the die corner portion and the punch corner portion, so that the thickness of the disc near the punch corner portion where the material is not replenished is thin. Further, the cylindrical open end is increased in plate thickness because the circumferential length of the material is shortened. For this reason, the plate thickness distribution of a drawing product fluctuates largely as shown in FIG. 19, and the diameter precision of a product worsens significantly.
In the method of drawing + ironing described in (2) above, when ironing the drawing product, the load of the ironing process is greatly increased as shown in FIG. 21 due to the non-uniformity of the plate thickness of the cylindrical part of the drawing product. Fluctuates. As a result, as shown in FIG. 22, mold distortion in the initial stage of molding is reduced, but mold distortion becomes large in the later stages of molding, and the cylindrical plate thickness of the ironing product fluctuates greatly, and the diameter precision is also poor.
In the method described in Japanese Patent Laid-Open No. 5-329559, the bottom portion of the cylindrical portion formed at the time of drawing is formed because the machining degree (ironing rate) of ironing and reverse ironing is about 16.4%. It is not possible to sufficiently eliminate the plate thickness reduction in the vicinity. And the diameter precision of the bottom part vicinity of a cylindrical part is bad.
It is an object of the present invention to provide a method of forming a bottomed cylindrical article in a flat plate with very improved diameter precision.
[Means for solving the problem]
The method of the present invention to achieve the above object is as follows.
(1) A drawing process is performed on a flat plate to draw a bottomed cylindrical material, and a sheet thickness increases to increase the plate thickness of the cylindrical part of the bottomed cylindrical material by plastic working. A method of forming a bottomed cylindrical product, comprising a step and subsequently an ironing process of ironing the bottomed cylindrical material to form a bottomed cylindrical product.
(2) The molding method of the bottomed cylindrical product of the base material which is a coining process (1) which is performed by the plastic working of the said plate thickness increasing process with respect to the bottom part of the said bottomed cylindrical material.
(3) The method for forming a bottomed cylindrical product of the substrate (1), wherein the plastic working of the plate thickness increasing step is an axial compression process performed on the cylindrical portion of the bottomed cylindrical material.
(4) a drawing processing step of forming a bottomed cylindrical material for performing draw processing on a flat plate having a central plate thickness larger than that of an end, and ironing the bottomed cylindrical material; Forming method of the bottomed cylindrical product constituting the ironing process for molding the bottomed cylindrical product subjected to the.
[Action]
In the above method (1), the plate thickness decreasing portion of the cylindrical portion is increased in the plate thickness increasing step before ironing, so that the plate thickness difference between the bottom portion of the cylindrical portion and the open end portion is reduced. As a result, mold distortion is reduced at the time of ironing and the cylindrical diameter accuracy is improved.
In the method (2), coining is performed on the bottom of the cylindrical material having a bottom, so that a part of the thickness (volume) of the bottom is combined with the thickness of the vicinity of the bottom of the cylindrical part.
In the method (3), an axial compressive force is applied to the bottomed cylindrical material to plastically deform the vicinity of the bottom of the cylindrical part in the thickness direction, thereby increasing the thickness of the cylindrical part near the bottom.
In the above method (4), the drawer is made with a thickened plate in advance for the drawing process, so that after the drawing process, the cylindrical part becomes almost uniform over the entire length. The mold twist becomes small, and the diameter accuracy of the cylinder after ironing is improved. In addition, since plastic processing such as coining is unnecessary, the apparatus cost is low.
EXAMPLE
EMBODIMENT OF THE INVENTION Below, the preferred embodiment of this invention is described with reference to drawings. 1 to 11 show the method of the first embodiment of the present invention, and FIGS. 12 and 13 show the method of the second embodiment of the present invention, and FIGS. 13 to 17 show the third method of the present invention. The method of the example is shown. The same reference numerals are used for parts common to all the examples.
First, the common structure and operation of the present invention will be described with reference to FIGS. 1 to 11.
The molding method of the bottomed cylindrical product (for example, the bottomed cylindrical product) of the present invention is a drawing of a flat plate (24), as shown in FIG. 16) by increasing the thickness of the plate thickness reduction portion (near the bottom portion) of the cylindrical portion of the cylindrical material 16 with a bottom by a drawing process for forming and plastic processing (coining or axial compression). Plate thickness increasing process which becomes the cylindrical material 15 with the bottom of negative plate thickness substantially uniform (However, the plate 25 which made the plate thickness of the center part larger than the plate thickness of an edge part as the flat plate 24 is. ), The plate thickness increasing process is unnecessary), and the ironing process is performed by ironing the bottomed cylindrical material 15 to form the bottomed cylindrical product 17.
That is, compared with the prior art, the difference in whether the plate thickness increasing process enters between the drawing process and the ironing process or the plate thickness of the center portion is larger than the plate thickness of the end portion at the stage of the flat plate 24 is different. .
In the drawing process, as shown in FIG. 2, the flat disk 24 is drawn with the punch 27 and the die 28, and the bottomed cylindrical material 16 is formed. Since the outer diameter of the punch 27 and the difference with the inner diameter of the hole of the die 28 are larger than the plate thickness of the original plate 24, the original plate 24 is not ironed.
As shown in FIG. 1, the drawing product 16 has a thin plate thickness near the bottom of the cylindrical portion and a thick plate thickness at the open end. For this reason, the precision of a diameter is not good.
In the plate thickness increasing process, the thickness (volume) is sent to the plate thickness reduction portion (near the bottom portion of the cylinder portion) of the drawing product 16 by plastic processing from a portion other than the plate thickness reduction portion, and the cylinder portion is formed in its entire length. Form a cylindrical material 15 with a bottom of approximately uniform thickness over.
As described in detail below, leveling is performed by coining in the first embodiment and axial compressive force in the second embodiment. In addition, as a countermeasure of the thickness smoothing process, in the step of the flat plate 24, a method of preliminarily increasing the plate thickness of the portion to be the thickness reducing portion during the drawing process may be used. It demonstrates in an example.
Subsequently, in the ironing process, as shown in FIG. 4, the bottomed cylindrical material 15 is ironed by the punch 18 and the die 19 to reduce the plate thickness and extend in the axial direction. And shaped into a bottomed cylindrical product 17. The difference 1/2 of the outer diameter of the punch 18 and the inner diameter of the die 19 is smaller than the thickness of the disc to be ironed in ironing. The ironing rate of the ironing process is 30 to 50%. In the sheet thickness increasing process, the ironing load is substantially constant over the entire ironing stroke (see Fig. 5). As a result, mold distortion is also uniform. As a result, the method of the present invention is more stable in load than the conventional method (e.g., drawing + ironing), and the diameter accuracy of the product after ironing is greatly improved (see FIG. 6). The diameter precision of the method of the present invention is 3 microns or less, and the precision is about 10 times higher than the 30 microns of the conventional diameter precision.
Subsequently, the configuration and operation specific to each embodiment of the present invention will be described.
In the first embodiment of the present invention, as shown in FIG. 3, coining is applied in the plate thickness increasing process. The right half of FIG. 3 shows before molding and the left half shows after molding. In FIG. 3, the punch 2 is fitted to the upper die 1 provided in the press ram (not shown), and the punch 2 is bolted by the retainer 3 to the upper die 1. It is fixed as. Moreover, when the molded product 15 adheres to the punch 2, it has a mechanism which can be removed, and the mechanism which can be removed has a rod 4 which can be removed. The removable rod 4 has a mechanism for pressing the molded product 15 toward the front end of the punch 2 by pressurization means such as a hydraulic cylinder, an air cylinder, a coil spring, or a urethane rubber, not shown. Detaching the molded product 15 is made by the plate 5 attached to the tip of the removable rod 4.
The lower die 8 is attached to the head (not shown) side of the press, and the cylindrical guide 9 is fitted into the guide hole formed in the lower die 8, and a coining lower punch 13 is provided inside the cylindrical guide. It is fitted. The guide 9 is attached to the lower die 8 with a bolt 11 by the retainer 10, and the material guide 12 is fitted to the inner diameter of the retainer 10. The coining lower punch 13 has a space capable of vertical movement between the guide 9 and the inner diameter and is moved by the lower rod 14. The lower rod 14 is moved up and down by an unillustrated hydraulic cylinder and air cylinder. In addition, it is also possible to add a load only upward, and in this case, a pressurized structure by a spring, a urethane, or a plate spring can be taken.
The drawing product 16 is set on the workpiece guide 12, with the lower punch 13 raised to the position shown. As the molding proceeds, the drawing product 16 is sandwiched by the punch 2 and the lower punch 13, and the lower punch 13 rests on the lower mold 9 with the inner diameter of the guide 9 restrained. Press to the corresponding position. At this time, the bottom part of the drawing product 16 is coined by the protrusion part a formed in the lower punch 13, and the coined material is supplied (increased in thickness) to the plate thickness reduction part by the drawing, and the cylinder A bottomed cylindrical material 15 is formed without negative plate thickness variation.
Examples of coining shapes are shown in FIGS. 7, 8 and 9.
Form A of FIG. 7 has a structure in which a block portion is formed under the bottom portion. Therefore, with the punch (13) having a diameter d 0 has a recess with a diameter d 1, a depth x.
Form B of FIG. 8 is a structure in which the convex part was formed in the upper side of the bottom part. For this reason, the upper punch 2 'has a recess.
Form C of FIG. 9 is a case where both the upper punch 2 and the lower punch 13 'have a flat cross section.
As shown in FIG. 11, the coining load is small in A and B shapes, and is preferable in view of the life of the mold and the molding energy.
The relationship between coining workability and diameter precision in A-shape of FIG. 10 is shown. As can be seen from FIG. 10, the diameter accuracy of the cylindrical portion after coining is greatly improved by the coining reduction ratio of 30% to 50%. However, the coining reduction ratio is defined as (1-T 1 / T) x 10%, and T and T 1 are as shown in FIG. 7, where T is the thickness of the cylindrical portion and T 1 is between the upper and lower punches The minimum interval of.
Although coining molding is shown in FIG. 1 and FIG. 3, this is an example, and it may be coined in the shaping | molding end part of a draw process. Thereby, process shortening is made and the cost reduction by the size down (miniaturization) effect of a press machine is attained. In addition, you may perform coining by any process before ironing.
In the second embodiment of the present invention, as shown in FIG. 12, the axial compressive force is applied to the cylindrical portion to increase the plate thickness in the vicinity of the bottom portion of the cylindrical portion. The drawing material 16 is set in the inner diameter hole of the die 21, and is compressed by a punch 20 having a stepped portion. Since this processing results in the buckling molding of the crushing die x, the gap is large with the die 21 in the portion where the plate thickness is thinned by the drawing processing, and deformation starts in the portion with the large interval. For this reason, deformation advances in the minimum plate | board thickness near the drawing punch shoulder R part, and the material fills substantially the whole cylindrical part area | region at the end of shaping | molding. For this reason, since it is possible to form a cylindrical shape with little fluctuation of plate thickness, and to suppress the deformation of the bottom part of a container, as shown in FIG. It divides by diameter, presses the punch 20 'to the bottom part of the drawing material 16, presses the open end of the drawing product 16 with the divided slip-shaped punch 20', and accumulates the axial compression force. It is also good for how to add wealth. According to this method, high precision of the product can be improved and material retention is improved.
In the third embodiment of the present invention, as shown in Figs. 13 to 17, the plate thickness variation during the drawing molding is calculated into a flat plate. According to this method, an intermediate molding step such as coining or axial compression becomes unnecessary, and an apparatus for this is unnecessary, resulting in low equipment cost and overall cost reduction of the product.
Claim 13 that turns a constant plate thickness (T) of the central portion, for example, using an original plate (29) toward the end portion gradually thickness (T 2) is reduced by cutting. When the disc 29 is draw-molded, as shown in FIG. 14, the plate thickness T 3 of the open end of the cylindrical portion and the plate thickness T 4 of the vicinity of the bottom portion are almost equal, and the ironing load This product becomes substantially constant, and as shown in Fig. 15, a product 17 having a substantially constant plate thickness and high diameter precision can be obtained.
As shown in FIG. 16, the original plate which thinned the plate | board thickness of the edge part may be the original plate 25 which coined the flat plate, and as shown in FIG. 17, the outer edge is pressed at the time of press trimming of a flat plate. Thus, it may be the original plate 26 having reduced plate thickness.
[Effects of the Invention]
According to the method of claim 1, between the drawing process and the ironing process, a plate thickness increasing part of the cylindrical plate thickness reducing part is provided, and even if there is a plate thickness reducing part in the cylindrical part by the drawing process, The cylindrical portion has a substantially uniform plate thickness over the entire area, and the ironing load and mold twist in the ironing process are almost constant. As a result, the diameter accuracy of the bottomed cylindrical product is greatly improved.
According to the invention of claim 2, since the plate thickness is increased by coining the bottom portion, the plate thickness reduction portion near the bottom portion of the cylindrical portion can be effectively uniformized at the bottom portion.
According to the invention of claim 3, the plate thickness is increased by applying an axial compressive force to the cylindrical part, so that the gap can be compensated over the entire axial length, and the plate thickness can be substantially constant over the entire length of the cylindrical part. Can be. In addition, the length of the cylindrical portion can be corrected to a predetermined length.
According to the invention of claim 4, at the stage of the flat disc, the variation in the thickness of the drawing process is calculated, and the apparatus can be finished without installing a device for coining processing or an apparatus for applying an axial compression force. Will lower the cost.
Claims (4)
- A drawing process for forming a bottomed cylindrical material by drawing a processing on a flat plate, and a plate thickness increasing process for increasing the plate thickness of the plate thickness reducing part of the cylindrical portion of the bottomed cylindrical material by plastic working. And subsequently, an ironing process of ironing the bottomed cylindrical material to form a bottomed cylindrical product.
- 2. The method of claim 1, wherein the plastic working of the plate thickness increasing process is coining processing performed on the bottom of the bottomed cylindrical material.
- 2. The method according to claim 1, wherein the plastic working of the plate thickness increasing process is an axial compression processing performed on the cylindrical portion of the bottomed cylindrical material.
- The drawing processing step of forming a bottomed cylindrical material which draws a bottomed sheet on a flat plate having a larger thickness at the center than the end thickness, and an ironing process of the bottomed cylindrical material. And an ironing process for forming the bottomed cylindrical article.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28645494A JP3579936B2 (en) | 1994-11-21 | 1994-11-21 | Molding method for bottomed tubular products |
| JP94-286454 | 1994-11-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960016995A KR960016995A (en) | 1996-06-17 |
| KR100195371B1 true KR100195371B1 (en) | 1999-06-15 |
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ID=17704606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950035021A KR100195371B1 (en) | 1994-11-21 | 1995-10-12 | Method of manufacturing a cup-shaped article |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5722282A (en) |
| EP (1) | EP0715908B1 (en) |
| JP (1) | JP3579936B2 (en) |
| KR (1) | KR100195371B1 (en) |
| DE (1) | DE69525596T2 (en) |
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| KR101747585B1 (en) | 2013-05-08 | 2017-06-14 | 신닛테츠스미킨 카부시키카이샤 | Method for molding cylindrical container with boss |
| WO2019209054A1 (en) * | 2018-04-27 | 2019-10-31 | 주식회사전우정밀 | Drawing apparatus for thickening and drawing bent portion and operating method therefor |
| WO2019209055A1 (en) * | 2018-04-27 | 2019-10-31 | 주식회사전우정밀 | Composite thickening drawing device for thickening and drawing plurality of bent parts and operating method thereof |
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| US6505492B2 (en) | 2001-04-11 | 2003-01-14 | Bethlehem Steel Corporation | Method and apparatus for forming deep-drawn articles |
| WO2005028887A1 (en) | 2003-09-16 | 2005-03-31 | Ntn Corporation | Shell-type needle roller bearing, supporting structure for compressor main shaft, and supporting structure for piston pump drive section |
| ITMN20040032A1 (en) * | 2004-11-18 | 2005-02-18 | Attrezzeria Mv & C Snc | A process for obtaining a monolithic hollow element made of aluminum alloy equipped with handles, and element obtained. |
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| DE102008018656B9 (en) * | 2008-04-11 | 2009-07-09 | Thyssenkrupp Steel Ag | Process for producing high-volume half-shells |
| KR20140143811A (en) * | 2012-04-02 | 2014-12-17 | 어드발 테크 홀딩 에이지 | Method for producing pot-shaped components in a shaping process |
| KR101644765B1 (en) | 2013-01-09 | 2016-08-01 | 신닛테츠스미킨 카부시키카이샤 | Press-forming method |
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| US2770034A (en) * | 1952-03-14 | 1956-11-13 | Lyon George Albert | Method of coining and cupping metal |
| US2877546A (en) * | 1953-06-09 | 1959-03-17 | Motor Wheel Corp | Method for forming tubular metal articles |
| US2776475A (en) * | 1953-09-30 | 1957-01-08 | Specialties Dev Corp | Method of making cylindrical metallic containers for confining fluid medium under pressure |
| US2875511A (en) * | 1955-04-28 | 1959-03-03 | Turner C Hawes | Method for coining blanks for deep drawn cylinders, and product thereof |
| GB1050358A (en) * | 1963-10-01 | |||
| DE1752186A1 (en) * | 1968-04-17 | 1971-04-08 | Vaw Ver Aluminium Werke Ag | Method for increasing the Tiefziehverhaeltnisses during deep-drawing of metal, in particular aluminum materials |
| US4339939A (en) * | 1977-06-16 | 1982-07-20 | Textron, Inc. | Drawing heavy walled parts |
| US4129024A (en) * | 1977-11-09 | 1978-12-12 | Aluminum Company Of America | Method and apparatus for forming elongated, tapered wall shells |
| JPS597430A (en) * | 1982-07-07 | 1984-01-14 | Hitachi Ltd | Drawing method |
| US4509356A (en) * | 1982-08-13 | 1985-04-09 | Verson Allsteel Press Co. | Method and apparatus for drawing heavy wall shells |
| US4527413A (en) * | 1982-08-13 | 1985-07-09 | Verson Allsteel Press Company | Apparatus for drawing heavy wall shells with a multi-step inside edge |
| JPH0126780B2 (en) * | 1983-11-09 | 1989-05-25 | Aisin Seiki | |
| US5209099A (en) * | 1985-03-15 | 1993-05-11 | Weirton Steel Corporation | Draw-process methods, systems and tooling for fabricating one-piece can bodies |
| JPH07102407B2 (en) * | 1990-03-14 | 1995-11-08 | 日産自動車株式会社 | Press forming method for cylindrical work |
| US5149238A (en) * | 1991-01-30 | 1992-09-22 | The Stolle Corporation | Pressure resistant sheet metal end closure |
| JP2982494B2 (en) * | 1992-05-29 | 1999-11-22 | トヨタ自動車株式会社 | Press method for forming plate-like material into cylindrical container |
| US5329799A (en) * | 1992-05-29 | 1994-07-19 | Toyota Jidosha Kabushiki Kaisha | Process and apparatus for press-forming tubular container-like article from strip, including forward and backward ironing steps |
-
1994
- 1994-11-21 JP JP28645494A patent/JP3579936B2/en not_active Expired - Fee Related
-
1995
- 1995-10-12 KR KR1019950035021A patent/KR100195371B1/en not_active IP Right Cessation
- 1995-11-20 EP EP19950118233 patent/EP0715908B1/en not_active Expired - Lifetime
- 1995-11-20 DE DE1995625596 patent/DE69525596T2/en not_active Expired - Fee Related
-
1997
- 1997-05-09 US US08/853,672 patent/US5722282A/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101747585B1 (en) | 2013-05-08 | 2017-06-14 | 신닛테츠스미킨 카부시키카이샤 | Method for molding cylindrical container with boss |
| WO2019209054A1 (en) * | 2018-04-27 | 2019-10-31 | 주식회사전우정밀 | Drawing apparatus for thickening and drawing bent portion and operating method therefor |
| WO2019209055A1 (en) * | 2018-04-27 | 2019-10-31 | 주식회사전우정밀 | Composite thickening drawing device for thickening and drawing plurality of bent parts and operating method thereof |
| KR20190124948A (en) * | 2018-04-27 | 2019-11-06 | 주식회사전우정밀 | A drawing apparatus for thicken-drawing a bending portion and a method for operating the same |
| KR20190124949A (en) * | 2018-04-27 | 2019-11-06 | 주식회사전우정밀 | A complex thicken-drawing apparatus for thicken-drawing a plural bending portion and a method for operating the same |
| KR102062228B1 (en) * | 2018-04-27 | 2020-01-03 | 주식회사전우정밀 | A drawing apparatus for thicken-drawing a bending portion and a method for operating the same |
| KR102062229B1 (en) * | 2018-04-27 | 2020-01-03 | 주식회사전우정밀 | A complex thicken-drawing apparatus for thicken-drawing a plural bending portion and a method for operating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960016995A (en) | 1996-06-17 |
| JP3579936B2 (en) | 2004-10-20 |
| EP0715908B1 (en) | 2002-02-27 |
| EP0715908A2 (en) | 1996-06-12 |
| DE69525596T2 (en) | 2002-07-18 |
| JPH08141662A (en) | 1996-06-04 |
| US5722282A (en) | 1998-03-03 |
| EP0715908A3 (en) | 1997-02-26 |
| DE69525596D1 (en) | 2002-04-04 |
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